A spraying device for steel box girder production

Abstract

The present application relates to the technical field of steel box girder production, and provides a spraying device for steel box girder production, which comprises a spraying device main body and a mounting frame; an adjusting assembly is arranged in the spraying device main body, a mounting frame is arranged on one side of the adjusting assembly, and a spraying structure is arranged at the top end of the mounting frame; the spraying structure comprises a connecting block, and the connecting block is arranged at the top end of the mounting frame. In the process of rotation of the stirring rod, the second bevel gear is used to drive the rotating rod to rotate, so that the rotating rod drives the spray head pipe to rotate in the process of rotation, the main spray head and the auxiliary spray head are in rotary spraying in the process of spraying, the spraying direction of the coating particles is changed constantly, the rotating spray head can uniformly sweep the coating to the surrounding, the concentration difference in the fixed direction is offset through dynamic superposition, and the situation that local over-thickness or over-thinness is caused by deviation of the moving track of the spray head is avoided.

Description

Technical Field

[0001] This invention relates to the field of steel box girder production technology, and in particular to a spraying device for steel box girder production. Background Technology

[0002] A steel box girder is a box-shaped beam structure made of welded steel plates. It is widely used in bridge engineering, especially in long-span bridges and large building structures. With its excellent mechanical properties, lightweight characteristics and construction adaptability, it has become an important load-bearing component in modern engineering. During the processing of steel box girders, their surfaces need to be painted, and spraying equipment is used for this process.

[0003] To address this, patent CN213529301U discloses an automated spraying device for the outer surface of a steel box girder, comprising: a horizontal track disposed on both sides of the steel box girder; columns slidably disposed on the horizontal track; a cantilever beam disposed on the columns, with the free ends of the cantilever beams facing each other towards the two side walls of the steel box girder; a crossbeam horizontally disposed above the steel box girder, with both ends of the crossbeam slidably connected to the columns; spray nozzles disposed at the bottom of the crossbeam and the free ends of the cantilever beam, respectively, for spraying the outer surface of the steel box girder; and a controller connected to the spray nozzles for controlling the opening and closing of the spray nozzles; wherein, the columns have a first driving component for driving them to move along the horizontal track. This utility model, through the movable arrangement of the columns on the horizontal track, achieves rapid and automated spraying of the outer surface of the steel box girder. Compared with existing technologies, it achieves comprehensive spraying of the steel box girder and saves costs.

[0004] The existing technical solutions described above have the following drawbacks: In the process of using the above technology, the movable setting of the column on the horizontal track enables rapid and automated spraying of the outer surface of the steel box girder. Compared with the existing technology, it achieves comprehensive spraying of the steel box girder and saves costs. However, during the spraying process, the traditional fixed nozzle is prone to uneven spraying when spraying the steel box girder, which affects the spraying effect. Therefore, a spraying device for steel box girder production is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a spraying device for steel box girder production, which solves the problem that the existing traditional fixed spray head is prone to uneven spraying when spraying steel box girders, thus affecting the spraying effect.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a spraying device for steel box girder production, comprising a spraying device body and a mounting frame;

[0007] The main body of the spraying device is equipped with an adjustment component, a mounting bracket is installed on one side of the adjustment component, and a spraying structure is installed on the top of the mounting bracket.

[0008] The spraying structure includes a connecting block, which is installed on the top of the mounting frame. A support block is installed on the top of the connecting block. A water pump is installed on one side of the support block. A connecting pipe is installed inside the support block. A nozzle pipe is rotatably sealed at one end of the connecting pipe. A guide sleeve is installed on the outside of one end of the nozzle pipe. A main nozzle is installed at the middle position of one end of the nozzle pipe. A secondary nozzle is installed around the main nozzle.

[0009] Preferably, a storage box is installed at the top of the rear end of the connecting block, a stirring rod is installed inside the storage box, a stirring frame is installed on the outside of the stirring rod, a rotating gear is installed at the bottom end of the stirring rod, a rack is installed on one side of the rotating gear, the bottom end of the rack is connected to the top end of the mounting frame, a second bevel gear is installed at the top end of the stirring rod, a rotating rod is installed at one end of the second bevel gear, one end of the rotating rod penetrates the interior of the support block, and the outside of one end of the rotating rod is connected to the outside of the nozzle pipe via a belt.

[0010] Preferably, a lead screw is installed inside the mounting bracket, a threaded sleeve is installed on the outside of the lead screw, the top end of the threaded sleeve is connected to the bottom end of the connecting block, and a servo motor is installed on one side of the lead screw.

[0011] Preferably, one end of the water pump is connected to one side of the storage tank, and the other end of the water pump is connected to one end of the connecting pipe.

[0012] Preferably, multiple sets of auxiliary nozzles are provided, and the angle between the multiple sets of auxiliary nozzles and the main nozzle is 15°-30°.

[0013] Preferably, an installation box is installed on one side of the rear end of the connecting block, an oil storage tank is installed on the top of the installation box, a blocking block is installed inside the installation box, a squeezing block is installed on one side of the blocking block, a spring is installed at the middle position of the squeezing block, a fixing block is installed on the top of the rack, and an oil outlet is opened at the bottom of the installation box.

[0014] Preferably, one end of the spring is connected to one end of the mounting box, and the other end of the spring is connected to one side of the extrusion block, forming a telescopic structure between the spring and the extrusion block.

[0015] Preferably, the adjustment assembly includes a mounting shaft, which is installed inside the body of the spraying device. A mounting sleeve is installed on the outside of the mounting shaft, one side of the mounting sleeve is fixed to one side of the mounting bracket, and a rotary motor is installed at the top of the mounting shaft. The mounting shaft and the mounting sleeve are connected by a thread.

[0016] Preferably, the bottom end of the main body of the spraying device is provided with a movable structure, the movable structure including a support frame, the support frame being installed at the bottom end of the main body of the spraying device, a rotating shaft being installed inside the support frame, a first bevel gear being installed on the outer side of the rotating shaft, a movable groove being opened at the bottom end of the support frame, a screw being installed inside the movable groove, the top end of the screw being connected to the bottom end of the first bevel gear, a screw sleeve being installed on the outer side of the screw, a universal wheel being installed at the bottom end of the screw sleeve, a guide block being installed on one side of the screw sleeve, and a guide groove being opened on one side inside the movable groove.

[0017] Preferably, the guide block slides inside the guide groove, and the guide block and the guide groove form a guide connection.

[0018] The present invention provides a spraying device for the production of steel box girders. The beneficial effects of the present invention are as follows:

[0019] 1. During the spraying process of steel box girder, the cooperation between the rotating gear and the rack allows the rotating gear to drive the mixing frame to rotate through the mixing rod, which can stir the paint inside the storage tank, making the paint more uniform. This prevents the paint from being sprayed in a way that is not fully stirred, which may result in poor coverage of the clear varnish in the early stage of spraying, or thick paste that is easy to clog the nozzle in the later stage, or excessive coating thickness and sagging. This will lead to significant differences in the color, thickness and anti-corrosion performance of the coating on the surface of the steel box girder, thereby improving the spraying effect.

[0020] 2. During the rotation of the nozzle tube, the main nozzle and the auxiliary nozzle will rotate and spray during the spraying process, so that the spraying direction of the paint particles will change continuously. This will sweep the paint evenly to the surroundings and offset the concentration difference in a fixed direction through dynamic superposition, avoiding the situation where the local thickness is too thick or too thin due to the deviation of the nozzle movement trajectory.

[0021] 3. At the same moving speed, the rotating nozzle can cover a larger area with a single spray, reducing the number of times the nozzle goes back and forth, enhancing the adaptability to corners and complex curved surfaces. Through the "sweeping" motion, it can cover multiple surfaces at corners, such as two adjacent planes at a 90° angle, without the need to frequently adjust the nozzle posture. For arc surfaces, the annular spray generated by rotation can evenly wrap the curved surface, avoiding the "single-point focusing" of the fixed nozzle that leads to local overspray.

[0022] 4. The auxiliary nozzle is tilted outward at an angle of 15°-30° with the main nozzle, focusing on the edges and transition areas. When rotating, the main nozzle forms a planar coverage around the center axis, while the auxiliary nozzle forms a ring-shaped coverage along the rotation trajectory. The combined coverage is wider. For the structure of the outer side of the steel box girder, which is wider in the middle and narrower at the edges, a single rotation can complete the synchronous spraying of the "center plane + edge slope", reducing the number of times the nozzle goes back and forth. This avoids the situation where a single nozzle is prone to uneven atomization energy distribution, resulting in a "thick center and thin edge" effect within the coverage area, thus making the spraying effect better.

[0023] 5. By using the rotating shaft and the first bevel gear together, the screw can be driven to rotate. By using the screw and the screw sleeve together, the universal wheel at the bottom can be pushed to move downward inside the moving groove, thereby lifting the main body of the spraying device and making it easier for the staff to move the position of the main body of the spraying device, thus completing the adjustment work. Attached Figure Description

[0024] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 This is a side view three-dimensional structural schematic diagram of the present invention;

[0026] Figure 3 for Figure 2 A magnified three-dimensional structural diagram of a portion of point A in the middle;

[0027] Figure 4 This is a frontal cross-sectional three-dimensional structural schematic diagram of the present invention;

[0028] Figure 5 This is a partial three-dimensional structural schematic diagram of the spraying structure of the present invention from a side view.

[0029] Figure 6 This is a three-dimensional structural schematic diagram of a partial cross-section of the spraying structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the spraying structure of the present invention, viewed from below, showing a partial cross-sectional view.

[0031] Figure 8 This is a three-dimensional structural schematic diagram of the movable structure of the present invention, viewed from below.

[0032] Figure 9 for Figure 8 A magnified three-dimensional structural diagram of a portion of point B in the middle section;

[0033] Figure 10 This is a partial three-dimensional structural diagram of the movable structure of the present invention;

[0034] Figure 11This is a partial three-dimensional structural diagram of the movable structure of the present invention, viewed from below.

[0035] Figure 12 This is a frontal three-dimensional structural diagram of the mounting box of the present invention;

[0036] Figure 13 This is a three-dimensional structural schematic diagram of the side cross-section of the mounting box of the present invention.

[0037] The reference numerals in the figures are as follows: 1. Main body of the spraying device; 2. Moving structure; 201. Support frame; 202. Drive motor; 203. Moving groove; 204. Rotating shaft; 205. First bevel gear; 206. Screw; 207. Guide block; 208. Guide groove; 209. Caster wheel; 2010. Screw sleeve; 3. Mounting frame; 4. Spraying structure; 401. Servo motor; 402. Connecting block; 403. Spray nozzle pipe; 404. Connecting pipe; 405. Rotating rod; 406. Water pump; 407. Support block; 408. Flow guide sleeve. 409. Auxiliary nozzle; 4010. Main nozzle; 4011. Threaded sleeve; 4012. Lead screw; 4013. Rack; 4014. Rotary gear; 4015. Stirring rod; 4016. Second bevel gear; 4017. Stirring frame; 4018. Oil storage tank; 4019. Mounting box; 4020. Extrusion block; 4021. Fixing block; 4022. Spring; 4023. Blocking block; 4024. Oil outlet; 4025. Storage tank; 5. Adjustment assembly; 501. Rotary motor; 502. Mounting shaft; 503. Mounting sleeve. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-13 The present invention provides a spraying device for steel box girder production, including a spraying device body 1 and a mounting frame 3; the spraying device body 1 is provided with an adjustment component 5, the mounting frame 3 is installed on one side of the adjustment component 5, and a spraying structure 4 is provided at the top of the mounting frame 3.

[0040] Reference Figures 9-11As shown: A movable structure 2 is provided at the bottom of the main body 1 of the spraying device. The movable structure 2 includes a support frame 201, which is installed at the bottom of the main body 1 of the spraying device. A rotating shaft 204 is installed inside the support frame 201, and a first bevel gear 205 is installed on the outside of the rotating shaft 204. A movable groove 203 is opened at the bottom of the support frame 201. A screw 206 is installed inside the movable groove 203. The top end of the screw 206 is connected to the bottom end of the first bevel gear 205. A threaded sleeve 2010 is installed on the outside of the screw 206. A universal wheel 209 is installed at the bottom end of the threaded sleeve 2010. A guide block 207 is installed on one side of the threaded sleeve 2010. A guide groove 208 is opened on one side inside the movable groove 203. The guide block 207 slides inside the guide groove 208, and a guide connection is formed between the guide block 207 and the guide groove 208.

[0041] Specifically, in this embodiment, when spraying the surface of the steel box girder, the main body 1 of the spraying device is first moved to the side of the steel box girder that needs to be sprayed. During the movement, the external power supply starts the drive motor 202. After starting, the drive motor 202 drives the rotating shaft 204 to rotate. During the rotation of the rotating shaft 204, the first bevel gear 205 rotates. During the rotation of the first bevel gear 205, the screw 206 rotates. During the rotation of the screw 206, the threaded sleeve 2010 rotates. During the rotation of the threaded sleeve 2010, the guide block 207 on one side of the threaded sleeve 2010 slides inside the guide groove 208, thereby guiding the threaded sleeve 2010 downward outside the screw 206. As the screw sleeve 2010 moves, it pushes the universal wheel 209 at its bottom end to move downward inside the moving groove 203, thereby lifting the main body 1 of the spraying device and making it easier for the operator to move the main body 1 of the spraying device. After the main body 1 of the spraying device is adjusted to the correct position, the drive motor 202 is started to reverse, thereby retracting the universal wheel 209 into the moving groove 203, so that the bottom end of the main body 1 of the spraying device contacts the ground, and the main body 1 of the spraying device is fixed in place by its own weight, thus completing the adjustment of the position of the main body 1 of the spraying device. This makes the adjustment of the position of the main body 1 of the spraying device more convenient and less laborious, and finally completes the adjustment of the position of the main body 1 of the spraying device.

[0042] Reference Figures 1-8 and Figures 11-12As shown: The spraying structure 4 includes a connecting block 402, which is mounted on the top of the mounting bracket 3. A support block 407 is mounted on the top of the connecting block 402. A water pump 406 is mounted on one side of the support block 407. A connecting pipe 404 is installed inside the support block 407. A nozzle pipe 403 is rotatably sealed at one end of the connecting pipe 404. A guide sleeve 408 is mounted on the outer side of one end of the nozzle pipe 403. A main nozzle 4010 is mounted at the middle position of one end of the nozzle pipe 403. A secondary nozzle 409 is mounted around the main nozzle 4010. A storage box 4025 is mounted on the top of the rear end of the connecting block 402. A stirring rod 4015 is installed inside the storage tank 4025. A stirring frame 4017 is installed on the outside of the stirring rod 4015. A rotating gear 4014 is installed at the bottom of the stirring rod 4015. A rack 4013 is installed on one side of the rotating gear 4014. The bottom end of the rack 4013 is connected to the top end of the mounting frame 3. A second bevel gear 4016 is installed at the top of the stirring rod 4015. A rotating rod 405 is installed at one end of the second bevel gear 4016. One end of the rotating rod 405 passes through the interior of the support block 407. The outside of one end of the rotating rod 405 is connected to the outside of the nozzle pipe 403 via a belt.

[0043] The mounting bracket 3 has a lead screw 4012 installed inside, and a lead sleeve 4011 is installed on the outside of the lead screw 4012. The top end of the lead sleeve 4011 is connected to the bottom end of the connecting block 402. A servo motor 401 is installed on one side of the lead screw 4012.

[0044] One end of the water pump 406 is connected to one side of the storage tank 4025, and the other end of the water pump 406 is connected to one end of the connecting pipe 404;

[0045] Multiple sets of auxiliary nozzles 409 are provided, and the angle between the multiple sets of auxiliary nozzles 409 and the main nozzle 4010 is 15°-30°.

[0046] An installation box 4019 is installed on one side of the rear end of the connecting block 402. An oil storage tank 4018 is installed on the top of the installation box 4019. A blocking block 4023 is installed inside the installation box 4019. A squeezing block 4020 is installed on one side of the blocking block 4023. A spring 4022 is installed in the middle of the squeezing block 4020. A fixing block 4021 is installed on the top of the rack 4013. An oil outlet hole 4024 is opened at the bottom of the installation box 4019.

[0047] One end of the spring 4022 is connected to one end of the mounting box 4019, and the other end of the spring 4022 is connected to one side of the extrusion block 4020. The spring 4022 and the extrusion block 4020 form a telescopic structure. The adjusting component 5 includes a mounting shaft 502, which is installed inside the spraying device body 1. A mounting sleeve 503 is installed on the outside of the mounting shaft 502. One side of the mounting sleeve 503 is fixed to one side of the mounting bracket 3. A rotary motor 501 is installed at the top of the mounting shaft 502. The mounting shaft 502 and the mounting sleeve 503 form a threaded connection.

[0048] Specifically, in this embodiment, after the position of the main body 1 of the spraying device is adjusted, when it is necessary to spray paint on the surface of the steel box girder, the water pump 406 is started to extract the paint from the storage tank 4025 and transport it to the inside of the connecting pipe 404, and then to the inside of the nozzle pipe 403. The paint is then sprayed out through the auxiliary nozzle 409 and the main nozzle 4010. During the spraying process, the servo motor 401 is started. After the servo motor 401 is started, it will drive the lead screw 4012 to rotate. During the rotation, the lead screw 4012 will drive the connecting block 402 to move to one side through the cooperation with the lead sleeve 4011, and move along one side of the steel box girder for spraying. During the movement of the connecting block 402, the storage tank 402 will be moved. 5. The rotating gear 4014 at the bottom moves. During the movement, the rotating gear 4014 contacts the rack 4013, causing the rotating gear 4014 to rotate. During the rotation, the rotating gear 4014 first drives the stirring rod 4015 to rotate. During the rotation of the stirring rod 4015, the stirring frame 4017 rotates, which can stir the paint inside the storage tank 4025, making the paint more uniform. This prevents the paint from being sprayed in a way that is not fully stirred, which may result in poor coverage of the clear varnish in the initial stage of spraying, and thick paste that is easy to clog the nozzle in the later stage, or excessive coating thickness and sagging. This will cause significant differences in the color, thickness and anti-corrosion performance of the coating on the surface of the steel box girder, thereby improving the spraying effect.

[0049] During rotation, the stirring rod 4015 also drives the second bevel gear 4016 to rotate. The second bevel gear 4016, in turn, drives the rotating rod 405 to rotate. The rotating rod 405, in turn, drives the nozzle tube 403 to rotate via a belt. Because the nozzle tube 403 and the connecting pipe 404 are rotary sealed, there will be no leakage during rotation. The rotation of the nozzle tube 403 causes the main nozzle 4010 and the auxiliary nozzle 409 to rotate and spray during the coating process. As the nozzle rotates, the spray direction of the paint particles constantly changes. The rotating nozzle can evenly sweep the paint to the surrounding area, dynamically superimposing the paint to offset the concentration differences in a fixed direction. This avoids localized over-thickness or under-thickness caused by nozzle movement trajectory deviation. Furthermore, at the same moving speed, a rotating nozzle can cover a larger area in a single spray, reducing the number of nozzle passes and enhancing adaptability to corners and complex curved surfaces. The outer side of steel box girders has many corners, such as flange edges and the rounded corners connecting the web and flange in the arc transition zone. The direct spray direction of a fixed nozzle cannot perfectly conform to the curved surface, easily leading to... To prevent missed areas from being sprayed, the rotating nozzle changes its spray direction with the angle, allowing it to cover multiple surfaces, such as two adjacent planes at a 90° angle, through a "sweeping" motion. This eliminates the need for frequent nozzle posture adjustments. For curved surfaces, the annular spray generated by rotation can evenly cover the curved surface, avoiding localized overspray caused by the "single-point focusing" of a fixed nozzle. Furthermore, during spraying, the secondary nozzle 409 tilts outwards at an angle of 15°-30° to the main nozzle 4010, focusing on edges and transition areas. During rotation, the main nozzle 4010 forms a planar coverage around its center axis, while the secondary nozzle... 409 forms a ring-shaped coverage along the rotation trajectory. The two are superimposed to form a wider coverage area. For the structure of the outer side of the steel box girder, which is wide in the middle and narrow at the edge, a single rotation can complete the synchronous spraying of "center plane + edge slope", reducing the number of times the nozzle goes back and forth. This avoids the situation where a single nozzle is prone to uneven distribution of atomization energy, which can easily form "thick in the center and thin at the edge" within the coverage area. This makes the spraying effect better, thus completing the spraying work of the steel box girder. During the spraying process, the spraying height can be adjusted by using the adjustment component 5, making the spraying process more convenient.When the connecting block 402 moves to one side, it will also drive the mounting box 4019 to move to one side. When the pressing block 4020 at the rear end of the mounting box 4019 contacts the fixing block 4021, since the pressing block 4020 and the fixing block 4021 have matching angles on both sides, the fixing block 4021 will press the pressing block 4020 to one side when they contact. When the pressing block 4020 moves to one side, it will first compress the spring 4022 to retract, and the pressing block 4020 will also compress the blocking block 4023 to... Moving to one side opens the oil outlet at the bottom of the oil storage tank 4018, allowing lubricating oil to flow into the mounting box 4019 and then drip out through the oil outlet 4024 to lubricate the rack 4013, reducing the friction between the rack 4013 and the rotating gear 4014, thus completing the lubrication process. When the pressing block 4020 detaches from one side of the fixing block 4021, the blocking block 4023 returns to its original position under the action of the spring 4022, blocking the oil outlet of the oil storage tank 4018 to facilitate the next oil filling, thus completing the lubrication work.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spraying device for steel box girder production, characterized in that: It includes the main body of the spraying device (1) and the mounting bracket (3); The spraying device body (1) is provided with an adjustment component (5), a mounting bracket (3) is installed on one side of the adjustment component (5), and a spraying structure (4) is provided on the top of the mounting bracket (3). The spraying structure (4) includes a connecting block (402), which is installed on the top of the mounting bracket (3). A support block (407) is installed on the top of the connecting block (402). A water pump (406) is installed on one side of the support block (407). A connecting pipe (404) is installed inside the support block (407). A nozzle pipe (403) is rotatably sealed at one end of the connecting pipe (404). A guide sleeve (408) is installed on the outer side of one end of the nozzle pipe (403). A main nozzle (4010) is installed at the middle position of one end of the nozzle pipe (403). A secondary nozzle is installed around the main nozzle (4010). (409), A storage box (4025) is installed on the top of the rear end of the connecting block (402). A stirring rod (4015) is installed inside the storage box (4025). A stirring frame (4017) is installed on the outside of the stirring rod (4015). A rotating gear (4014) is installed at the bottom end of the stirring rod (4015). A rack (4013) is installed on one side of the rotating gear (4014). The bottom end of the rack (4013) is connected to the top end of the mounting frame (3). A second bevel gear (4016) is installed at the top end of the stirring rod (4015). A rotating rod (4017) is installed at one end of the second bevel gear (4016). 5) One end of the rotating rod (405) passes through the interior of the support block (407). The outer side of one end of the rotating rod (405) is connected to the outer side of the nozzle pipe (403) via a belt. A lead screw (4012) is installed inside the mounting bracket (3). A threaded sleeve (4011) is installed on the outer side of the lead screw (4012). The top end of the threaded sleeve (4011) is connected to the bottom end of the connecting block (402). A servo motor (401) is installed on one side of the lead screw (4012). An installation box (4019) is installed on one side of the rear end of the connecting block (402). An oil storage tank (4018) is installed on the top of the installation box (4019). The mounting box (4019) is equipped with a blocking block (4023) inside. A pressing block (4020) is installed on one side of the blocking block (4023). A spring (4022) is installed in the middle of the pressing block (4020). A fixing block (4021) is installed at the top of the rack (4013). An oil outlet hole (4024) is opened at the bottom of the mounting box (4019). One end of the spring (4022) is connected to one end of the mounting box (4019), and the other end of the spring (4022) is connected to one side of the pressing block (4020). The spring (4022) and the pressing block (4020) form a telescopic structure.

2. The spraying device for steel box girder production according to claim 1, characterized in that: One end of the water pump (406) is connected to one side of the storage tank (4025), and the other end of the water pump (406) is connected to one end of the connecting pipe (404).

3. The spraying device for steel box girder production according to claim 1, characterized in that: The auxiliary nozzle (409) is provided in multiple sets, and the angle between the multiple sets of auxiliary nozzles (409) and the main nozzle (4010) is 15°-30°.

4. The spraying device for steel box girder production according to claim 1, characterized in that: The adjustment assembly (5) includes a mounting shaft (502), which is installed inside the body (1) of the spraying device. A mounting sleeve (503) is installed on the outside of the mounting shaft (502). One side of the mounting sleeve (503) is fixed to one side of the mounting bracket (3). A rotary motor (501) is installed at the top of the mounting shaft (502). The mounting shaft (502) and the mounting sleeve (503) form a threaded connection.

5. A spraying device for steel box girder production according to claim 1, characterized in that: A movable structure (2) is provided at the bottom end of the main body (1) of the spraying device. The movable structure (2) includes a support frame (201). The support frame (201) is installed at the bottom end of the main body (1) of the spraying device. A rotating shaft (204) is installed inside the support frame (201). A drive motor (202) is installed at one end of the rotating shaft (204). A first bevel gear (205) is installed on the outside of the rotating shaft (204). The bottom end of the support frame (201) is opened. There is a movable groove (203), and a screw (206) is installed inside the movable groove (203). The top end of the screw (206) is connected to the bottom end of the first bevel gear (205). A screw sleeve (2010) is installed on the outside of the screw (206). A caster wheel (209) is installed at the bottom end of the screw sleeve (2010). A guide block (207) is installed on one side of the screw sleeve (2010). A guide groove (208) is opened on one side inside the movable groove (203).

6. The spraying device for steel box girder production according to claim 5, characterized in that: The guide block (207) slides inside the guide groove (208), and the guide block (207) and the guide groove (208) form a guide connection.

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